Improvement in locomotive smoke-stacks



J. MACKENZIE.

LOCOMOTIVE SMOKE-STACKM Patented Feb. 15 "1876.

O'GO

Zz e n'fdz N. PETERS, FHOTO-LITHOGRAFHER, WASHINGTON. D C.

OFF-ICE.

, JOHN MACKENZIE, or HANNIBAL, MIsso ur.

IMPROVEMENT IN LOCOMQTIVE SMOKE-STACKS Specification forming part ofLetters Patent No. 173,4 l 2, dated February 15, 1876; application filedJuly 23, 1875.

To all whom it may concern: 1

Be it known that I, JOHN MACKENZIE, of

the city of Hannibal, county of-Marionhand State of Missouri, haveinvented a new and useful Improvement in Smoke-Stacks for L0-:comotiveEngine-Boilers; and I hereby declare that the following isafullfclear, and exactdescription and specification of the same,referring to the annexed drawings malt,-

ing part of the same.

I save the wear of the sides of the stack by preventing the sparks fromstriking against them, when the cone deflects the sparks from the centerto the circumference under the influence of the exhaust-blast of theengine.

My invention consists, first, in a new sparkcone, composed of concentricdisks of different diameters, placed one above another, so

that their circumferences shalllie substantially in the periphery of acone, with its apex inverted or pointing downward, each disk beingcupped out on its under face by a circular groove near the outer edgethereof, for the purpose of checking and returning the sparks as theystrike the lower surface of the disk, the curve directing them inwardand downward toward the top of the disk, immediately below,'and thusbeating them to a fine powder before they pass from the stack. I

Second, my invention consistsin construct-. ing the cone in separatedisks cast in pieces, and held together on a central bolt, the up. perdisk being supported in the stack by bars or stays, and the bolt holdingthe lower disks suspended from the upper one.

Thirdly, my invention consists in the combination of a circular conicaldeflector with the stack and a cone, to prevent the sparks from strikingthe sides of the stack, and to compel them to pass-between the cone andits inner surface in leaving the stack.

In order that persons skilled in the art may understand, make, and usemy improvements, I will proceed to describe the construction I haveadopted, referring to the annexed drawings, in which- Figure 1represents the exterior of the stack. Fig. 2 represents a verticalcentral section of the same. Fig. 3 is a top view of deflector and cone.

- a a a a a are the disks of the cone, held together by a centralvertical bolt-rod, c, and the series composing the cone is supported inthe smoke-stack k by the stays cl d d d attached to the s ack below, andto the upper disk a at the top. The deflector b is also supported by thestays d, by means of the ears e e e e, which project inwardly from theupper edge of the deflector, and over the upper surface of the upperdisk, leaving a space between the deflector and the circumference of thedisk. These ears are punched with small holes, through which the boltsor stays d pass, and are held down by nuts.

The deflector b is conical, the larger diame. ter being at the loweredge, so as to guide the blast and sparks toward the center of thestack, and into the space between it and the cone.

The sparks are thrown by the blast up the straight portion of'the stackg, and against the under surfaces of the disks, and into the cuppedrecesses h h h h h. The recesses being curved the sparks are thrown intoward the center, and then downward toward the top of the lower disk.Those which strike the lower disk are sent toward the next disk above,when the same action is again repeated until they pass, broken, upthrough the deflector, andout of the stack.

My improved cone is much superior to those now in use, and effectuallyheats up the sparks before leaving the stack.

The sectional construction of my cone enables me to introduce a new diskwhen one is worn out, and thus save time and expense for iron in thestack, as the constant wear of e v "3.41s

the sparks against the sides of the stack, faces recessed out near theirouter edges to when the deflector is not used, soon renders returnthe-sparks, as set forth.

itneeessary to replace the upper portion of the stack. v JOHN MACKENZIE.

What I claim as my invention, and desire to secure by Letters Patent, is- Witnesses:

The spark-cone for locomotive smoke-stacks, ISAAC N. WILBER, made up ofparallel disks, with their under sur-' HENRY STEIN.

